Optical disk with stop-pulse generating means in a guide groove
US6031814A · kind A · utility
25Cited by
32References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 27, 1997 |
| Grant date | Feb 29, 2000 |
| Priority date | — |
| Expiry date | Jan 27, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/2537
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A recording and reproducing apparatus for an optical disk of the transitional type that can be overwritten, having an optical information recording medium. The medium has a guide groove and a sector ID area. Information is recorded by irradiation with a light beam to change a state of a photo-sensitive record layer, and the recording may be stopped by the generation of a stop pulse. The stop pulse may be generated by an altered width of the guide groove before the sector ID area, or by one or more larger prepits before the sector ID area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.